should_be_discarded_有道手机词典

1.If the filter has been saturated with motor oil, it should be discarded and replaced.
如果过滤器已被机油浸透，就应该丢掉并更换一个。
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2.Outdated theory should be discarded.
过时的理论应当抛弃。
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3.If they show any signs of yellowing, they should be discarded.
如果它们有任何黄化的迹象，就该丢掉了。
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